Shaking and dumping grate



(No Model.) 2 sheets-sheen 1. G. M. CONWAY. SHAKING AND DUMPING GRATB.

No; 556,403. Patented Mar.- 17, 1896. I 1 Pf 6;.

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G. M. CONWAY.V SHAKING AND DUMPING GRATB.

Patented Mar. 17,' 1896.

@in llinililiinn f @Kl/WWW' VNITED STATES PATENT OFFICE..

GEORGE M. CONVAY, OF

MILVAUKEE, VISCONSIN.

SPECIFICATION forming part of Letters Patent No. 556,403, dated March 1'7, 1896.

Application filed May 2, 1893.

To @ZZ whom, iv' may concern:

Be it known that I, GEORGE M. CONWAY, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new and useful Improvements in Shaking and Dumping Grates g and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to shaking and dumping grates and it consists in certain peculiarities of construction and combination of parts, as will be fully set forth hereinafter and subsequently claimed.

In the drawings, Figure l is a side elevation of my improved device with parts broken away and shown partly in section on the line I l of Fig. 2. Fig. 2 is a plan view of a portion, of my device with portions thereof broken away or removed and partly in section. Fig. 3 is a partly vertical sectional view on the line 3 3 of Fig. 1. Figs. 4 and 5 are detail sectional views of the grate-sections in different positions, Fig. 4 being taken on a section through the central portion of the grate-sections,and the section-line of Fig. 5 being taken adjacent to the end of the grate-sections beyond the last side extensions of the transverse bars, which therefore do not show in said Fig. 5. Figs. 6 and 7 are enlarged detail views of portions of the frame.

Heretofore in shaking and dumping grates as ordinarily constructed the grate-sections have been arranged to dump only one way, and with such ordinary grates the moment they begin to turn in the act of shaking the space between each two adjacent sections increases as the grate is turned, allowing the material resting thereon to fall down through between said sections7 occasioning much waste thereby7 whereas in my grate the sections are arranged to dump either way, and are so constructed that the space between each two adjacent sections, while passing through an angle of thirty degrees or more either way from their normal vertical line in shaking, will remain always the same, and this operation of shaking within the angular limits named will sufficiently disturb the material resting on the grate to free it from dust, ashes, or whatever substance is to be eliminated therefrom Serial No. 472,722. (No model.)

and break up incrustation and eifectuall y prevent. the material from filling up the grate and its insterstices, as in the case of burning a refuse coal,where slag and clinkers are liable to form, without permitting the valuable part of said material to dump down between said sections and become lost. Then by passing from the said angle of thirty degrees or more to an angle of sixty or more degrees the space between the sections will increase sufficiently to enable the material to be dumped, and by the reversing process rendered possible by my construction the sections can be turned back and forth from one side to the other, so that the described incrustation, already broken by the shaking, can be reduced to such size as to cause all portions thereof which lodge between said sections to become still further reduced and fall down through between the sections in dumping. rIhese results are attained by reason of the construction which I will now proceed to describe.

As shown in the drawings,.the grate is arranged for use in connection with a horizontal cylindrical boiler, though it will be' understood that it is adapted for any kind of furnace or drying floor desired.

My grate rests upon its own supports independently of the surrounding walls.

A A represent the legs or supports of my device.

B B represent the horizontal end frames of the device, which interlock with the top of the legs A A in this manner. Each of the legs A has a central vertical inner web a, the upper part of which web has a cross-head a', and said legs have enlarged bases or feet a2. At points directly over said legs the end frames Bare formed, as shown in detail, Fig. 7, with downward forked iian ges b l) (designed to embrace the described webs CL of the legs A between the transverse outer edge of the said legs and the cross-head a) and horizontal flange b at the top of the forked flanges Z) b, so that when the end frames B B are dropped to place on the legs A A all parts will be held firmly together, the horizontal flange b resting on the top of the web a and crosshead a. In addition, the frames B B have IOO vertical angle-flanges b2 b2 on their inner sides, above the flanges b b and rising to the height of the said frames B. All these parts (shown in Fig. 7) are cast solidly and integral with the said frames B.

C C represent the two side bearing-bars, and D the center bearing-bar of the frame. The ends of these bars are provided with crossheads c for engagement with the an gle-flanges b2 b2 of the frames B, back of which are the flanges CZ having right-angular bottom extensions di for the ends e of the stationary outer gratesections E hereinafter described. The bars C are each provided on the inner side with a series of round hubs c, perforations c2 extending through the center of said hubs and through the side bearing-bars in line therewith, as shown best at the left hand in Fig. 3. The bars C are further provid ed with projecting arms c3 on the outer side, and the end fra-mes B are similarly provided with end flanges b3, both the arms c3 and flanges b3 being designed for the support of the webs fon the under side of the perforated inclined plates F hereinafter described.

The center bearing-bar, D, is provided on both Asides with hubs d having perforations (Z2 therethrough and through the said bar in linetherewith, as best shown in the center of Fig. 3, similar to the hubs c' on the bars C;

but unlike those hubs c the hubs d are not l wholly round, but are cut away on the under side, as shown at d, to enable the grate-sec l tions to be placed on or removed from the hubs separately without disturbing the end frames and side and center bearing-bars.

The center har, D, is further provided with a series of teeth d5 d5 arranged at intervals to fill up the space that would otherwise be left between the adjacent ends of grate-sections, l

f top and inner sides; but the outer sides of next described;

The stationary outer grate-sections E, al readynamed, comprise a centralvertical web, l (whose ends e e rest on the flange extensions d of the bearing-bars C C, as already stated, Q between the flanges d on said bars and the: adjacent flanges b2 of the end frames 13,) said web being provided at each side with obliqnelyinclined teeth projecting inward and j downward from one side of said web and out ward and upward from the other side thereof, as shown best in full lines on the righthand side and in dotted lilies on the left-hand side of Fig. 1.

them in this form of my device, all parallel with the said end frames B B, and as they inner end pieces, g 7L and t' fi, with rounded Only one of these stationary y outer grate-sections E is shown in Fig. 2, but l it will be understood that there are four of` tops and vertical parallel sides and having lower lever extensions, g h t" t", as best indicated in Fig. 5, which latter are connectedby pivots jj with a parallel connecting-bar J, which latter is connected by forked head j and pivot 7c to the connecting-rod K, which extends from this point to the shaking-le ver M, hereinafter particularly described, to which the rod K is pivoted, as shown by the pivot-pins L. In addition, each of the said inner ends of the grate-sections have circular openin gs g2 h2 'i2 t2 therethrough to receive the described hubs d d on the center bearingbar, D. The outer ends of the grate-sections g3 i, &c. are correspondingly rounded on top and have slotted openings g4 4, dre., in their lower edges to Apass down over the hubs c c on the side bearing-bars, C C, said ends being extended downward below the hub-line and transversely perforated to receive lockingpins g5 5, &c., just below the lower line of said hubs.

The intermediate:grate-sections I 1 areeach composed,in addition to the already-described parts, of a series of transverse bars, rounded on top `in conformity with the cnrvatures of the `described inner end pieces, but which project beyond the line `of the described vertical parallel sides, the said grate-sections at the line of these bars being transversely of spherical triangular shape, as clearly indicated by the two intermediate grate-sections in Fig. 4. rThe outline of the outer end pieces of these said intermediate grate-sections :is of corresponding formdown to the base of the described hub-line. The outer movable gratesections, G Il, have similar series of tra-nsverse bars, which are of similar form on the said sections Gr H are modified, as shown at the right and left in Fig. l and at the left in Fig. 4f, by being struck on a circle from the center of Ithe openings, as h2, that receive the hubs d', forming a sector of said circle ex# tending from the intersection of the said rounded top surface and adjacent vertical side of the grate-section down to the base-line of said vertical side.

The shakingdevers M (of which there is one for each set of grates, two being shown in the present illustration) are preferably of the general form shown in Fig. l, and are pivoted, as already described, at L to the connecting-rod K, and also, as shown at n, to an arm or projection n. on a casting N, (which acts as the fulcrum of said lever,) the upper portion of which casting is preferably bifurcated, (as well as shown double in the form illustrated for the two levers of the two sets of grates, that being a mere matter of convenience, however,) and in the opening of said bifurcated portion there mov-es a rearward extension of said lever M, having an arc slot m. The said bifurcated casting has two holes therethrough, the upper one being IOO IIO

registering, when the parts are in the position shown in Fig. l, with a hole m through the lever extension below said slot. O is a pin adapted for engagement with either of the holes described, as circumstances may require. The lever M is provided with a suitable socket p for the reception of a lever-handle P, as shown.

The operation of my device will next be described, the parts being in the relative positions shown in Fig. l, and it being understood, for the purpose of this explanation, that my invention is here shown as arranged for a coal-burning furnace,'although, as heretofore stated, not in any sense limited thereto.

The fuel is fed onto the upper surface of the grate and properly ignited, and when a suflicient quantity has been consumed to cause the resultant ashes and clinker to partially close up the orifices in the grate-sections it becomes necessary, in order to continue a proper combustion, to get rid of that deposit. This is accomplished by shaking the grate-sections back and forth, as described, the limitations enforced by the relative arrangement of the pin O and the arc slot m in the shaking-lever serving, automatically, to keep the movement of the said grate-sections within the angularlimits hereinbefore named without increasing the size of the opcnin gs between the adjacent grate-sections, and this, as already stated,will suffice to get rid of the dust, ashes, and like refuse matter without loss of fuel, the said space between the grate-sections in this position (shown in Fig. 4:) being the same as when they are in their normal upright position. (Shown in Fig. l.) Vhen in said normal position, the pin O is shifted to the lower hole, m', and thereby the parts are rigidly locked and all movement of the grate-sections prevented. As the ashes and other refuse matter are gotten rid of, as described, the fuel which is piled up against the obliquely-inclined plates F gradually settles down, and the ashes are liberated from the said plates and from the inclined stationary outer grate-sections. The perforations in the said plates F are to admit air therethrough, and thereby aid in the combustion of the fuel, and the described hopperlike formation of the inclined parts E E F F aid in keeping the fuel fed forward to the grate, as well as in the j ust-described liberation of refuse matter and in the operation of dumping. y

Then it becomes necessary to dump the grate, the pin O, which is preferably secured by a chain (not shown) to some adjacent portion of the structure, is wholly removed and dropped down, and-then the lever M is operated by means of the handle P to its fullest extent back and forth, whereby the gratesections assume at each end of the movement the relative positions shown in Fig. 5, the openings between the adjacent grate-sections amounting to nearly forty per cent. of the entire grate area, instead of only about six per cent. thereof when the said sections are in either their normal or shaking positions, and consequently the grate is very quickly dumped.

My grate-sections are preferably strengthened by central transverse Webs 6, as shown in Fig. 3, and all parts of said sections are cast solidly in one piece. The hubs upon which said grate-sections are supported, as well as the bearing-bars of which said hubs form portions, are made hollow or perforated at these points, as described, for the purpose of securing a circulation of air therethrough, and aiding thereby in keeping the said parts comparatively cool in use, and by reason of the described cut-away portions d4 of the hubs d on the center bearing-bar D and the slotted openings g4 4, &c., at the opposite end of the grate-sections G I, &c. the said sections can, as already stated, be readily dropped to place and then secured against accidental displacement by means of the described locking-pins g5 6, dac., which pins can be easily removed for the Withdrawal of any of said grate-sections in the reverse manner, it being, of course, necessary to remove the split locking-pins g7 i7 k7, which secure the pivots j on the lower ends of the lever extensions g z" h' of the grate-sections to the parallel connecting-bar J, before this removal can take place, and to secure such locking devices in place when the grate-sections are adjusted.

In place of the described connecting-bar J IOO and connecting-rod K any suitable connecting device may be employed, so far as the described operation of my grate-sections is concerned, but I have found the means described to work well in practice.

A valuable feature of my present device lies in the fact that the entire frame is so constructed as to be readily removable at all parts for the replacement or repair of abroken portion, and is all put together and held rigidly in place without the use of a single nut or rivet, and hence the injury arising from the burning, breaking or warping of such securing devices in other shaking and dumping grates is wholly obviated.

Having thus described my invention, wha I claim as new, and desire to secure by Letters Patent, is-

l. In a shaking and dumping grate, a series of intermediate movable grate-sections, each comprising vertical parallel sides connected by transverse bars integral therewith and projecting beyond the line of said sides, and having integral end pieces, said grate-sections at the line of said bars being transversely of spherical triangular shape, and outer movable grate-sections, corresponding at the top and inner sideswith the shape of the said intermediate grate-sections, but each having its outer bar extensions forming a sector cfa circle extending from the intersection of the rounded top surface and adjacent vertical side of the said grate-section down to the base-line of the said vertical side.

IIO

2. In a shaking and dumping grate, the` combination with a suitable socketed frame, and a series of movable grate-sections connected together and mounted therein, of independent removable outer stationary gratesections, each comprising a vertical web, and obliquely-inclined transverse teeth projecting outward and upward, and inward and downward, from the opposite sides of said web, and held in the sockets of said frame, free from .extraneous fastening devices.

In a shaking and dumping grate, the combination with a series of independent legs, each provided with enlarged bases, central vertical webs and cross-heads, of end frames having downward-forked flanges for engagement with said webs, horizontal flanges projecting above said forked flanges, and vertical angle-flanges above the said horizontal GEORGE M. CONWAY.

fitnesses H. G. UNDERwooD, C. XV. SCOTT. 

